http://encyclopedia.thefreedictionary.com/Demographics%20of%20Iran
Persians 51%, Azeri 24%, Gilaki 8%, Kurd 7%, Arabs 3%, Lurs 3%,Baluchis 3%, Turkmen 2%
As the first great conqueror of Indo-European blood, Cyrus's vision was to unite the divided Asian nations under the banner of justice and reconciliation. To demonstrate his exceptional tolerance and magnanimous attitude towards the defeated there is perhaps no better example than the decree he isssued in 539 B.C. at the conquest of Babylon:
Unprecedented, as it was, Cyrus graciously issued a decree for the emancipation of the Jews and rebuilding of what is known as the Second temple in Jerusalem. Some 50000 Jews held captive at Babylon returned freely to their holy land, which was the first major repatriation of the Jewish people after many years of exile and hardship. It is not surprising, thus, that in the Bible he is repeatedly (over 20 times) referred to, with glory and respect:
"This is What Cyrus King of Persia says: The LORD the God of heaven, has given me all the kingdoms of the earth and he has appointed me to build a temple for him at Jerusalem in Judah." Ezra 1:2 (New International Version)
"In the first year of King Cyrus, the king issued a decree concerning the temple of God in Jerusalem: Let the temple be rebuilt as a place to present sacrifices, and let its foundations be laid. It is to be ninty feet high and ninety feet wide" Ezra 6:3 (New International Version) who says of Cyrus, "He is my shepherd and will accomplish all that I please; he will say of Jerusalem, "Let it be rebuilt," and of the temple, "Let its foundations be laid." Isaiah 44:28 (New International Version)
"This is what the LORD says to his annointed, to Cyrus, whose right hand I take hold of to subdue nations before him and to strip kings of their armor, to open doors before him so that gates will not be shut." Isaiah 45:1 (New International Version)
"I will raise up Cyrus in my righteousness: I will make all his ways straight. He will rebuild my city and set my exiles free, but not for a price or reward, says the LORD Almighty." Isaiah 45:13 (New International Version)
In 525 B.C., only three years after the death of Cyrus, his son and successor Cambyses conquered Egypt. This conquest of the only remaining ancient oriental power rounded out the Persian Empire to include the whole civilised East from the Nile Delta, around the entire east of the Mediteranean to the Aegean, and from this western boundary eastward to India. This great achievement only took 25 years from the overthrow of the Medes by Cyrus.